export data from mongo to hive - mongodb

Question

my input: a collection("demo1") in mongo db (version 3.4.4 )
my output : my data imported in a database in hive("demo2") (version 1.2.1.2.3.4.7-4)
purpose : create a connector between mongo and hive
Error:
Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. com/mongodb/util/JSON
I tried 2 solutions following those steps (but the error remains):
1) I create a local collection in mongo (via robomongo) connected to docker
2) I upload those version of jars and add it in hive
ADD JAR /home/.../mongo-hadoop-hive-2.0.2.jar;
ADD JAR /home/.../mongo-hadoop-core-2.0.2.jar;
ADD JAR /home/.../mongo-java-driver-3.4.2.jar;
Unfortunately the error doesn't change; so I upload those version, I hesitate in choosing right version for my export, so I try this:
ADD JAR /home/.../mongo-hadoop-hive-1.3.0.jar;
ADD JAR /home/.../mongo-hadoop-core-1.3.0.jar;
ADD JAR /home/.../mongo-java-driver-2.13.2.jar;
3) I create an external table
CREATE EXTERNAL TABLE demo2
(
id INT,
name STRING,
password STRING,
email STRING
)
STORED BY 'com.mongodb.hadoop.hive.MongoStorageHandler'
WITH
SERDEPROPERTIES('mongo.columns.mapping'='{"id":"_id","name":"name","password":"password","email":"email"}')
TBLPROPERTIES('mongo.uri'='mongodb://localhost:27017/local.demo1');
Error returned in hive :
Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. com/mongodb/util/JSON
How can I resolve this problem?

Answer 1

Copying the correct jar files (mongo-hadoop-core-2.0.2.jar, mongo-hadoop-hive-2.0.2.jar, mongo-java-driver-3.2.2.jar) on ALL the nodes of the cluster did the trick for me.
Other points to take care about:
Follow all steps mentioned here religiously - https://github.com/mongodb/mongo-hadoop/wiki/Hive-Usage#installation
Adhere to the requirements given here - https://github.com/mongodb/mongo-hadoop#requirements
Other useful links
https://github.com/mongodb/mongo-hadoop/wiki/FAQ#i-get-a-classnotfoundexceptionnoclassdeffounderror-when-using-the-connector-what-do-i-do
https://groups.google.com/forum/#!topic/mongodb-user/xMVoTSePgg0